Tymofii created SPARK-40351:
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Summary: Spark Sum increases the precision of DecimalType
arguments by 10
Key: SPARK-40351
URL: https://issues.apache.org/jira/browse/SPARK-40351
Project: Spark
Issue Type: Question
Components: Optimizer
Affects Versions: 3.2.0
Reporter: Tymofii
Currently in Spark automatically increases Decimal field by 10 (hard coded
value) after SUM aggregate operation -
[https://github.com/apache/spark/blob/branch-3.2/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala#L1877.]
There are a couple of questions:
# Why was 10 chosen as default one?
# Is it make sense to allow the user to override this value via configuration?
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